Spain managed to beat Portugal 1-0 on Tuesday, following a goal by the 28-year-old.
“I am very happy for the win, although we suffered a lot,” Villa told AS after the match. “We deserved to win, so I believe the result is fair.
“They finished really well and individually have two excellent central defenders, but luckily, we were able to take one of our chances.
“My aim is to keep scoring like this, especially in the big matches, so we can advance through the tournament.
“I thank the fans for their support. We have kept on improving as a side after the loss to Switzerland in the opening match.”
“We know what has occurred in previous matches, like against Switzerland. Paraguay will be tougher than Portugal because the side has reached the quarter-finals for the first time,” he added.